81217520

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{32749}}^1$

素因数の和:32793

約数の個数: 40

約数和(自身を含む): 194928000

約数和(自身を除く): 113710480

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 32749, 65498, 130996, 163745, 261992, 327490, 523984, 654980, 1015219, 1309960, 2030438, 2619920, 4060876, 5076095, 8121752, 10152190, 16243504, 20304380, 40608760, 81217520]

約数ペア:

[(1, 81217520), (2, 40608760), (4, 20304380), (5, 16243504), (8, 10152190), (10, 8121752), (16, 5076095), (20, 4060876), (31, 2619920), (40, 2030438), (62, 1309960), (80, 1015219), (124, 654980), (155, 523984), (248, 327490), (310, 261992), (496, 163745), (620, 130996), (1240, 65498), (2480, 32749)]